Scrypt Hash Generator

Generate secure scrypt password hashes with customizable cost parameters for enhanced security

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Memory-Hard Algorithm

Designed to be computationally and memory intensive, resistant to hardware attacks

⚙️

Customizable Parameters

Adjust cost factors (N, r, p) to balance security and performance

🛡️

Password Security

Ideal for password hashing and key derivation with built-in salt

🔒 Client-Side Processing
All hashing is done in your browser using Web Crypto API and scrypt-js. Your passwords never leave your device.

Password to hash

Salt (optional)

Scrypt Parameters

N (CPU/Memory Cost)

Higher = more secure but slower

r (Block Size)

Affects memory usage

p (Parallelization)

Number of parallel threads

Key Length (bytes)

Length of derived key

Output Format

Your scrypt hash will appear here...

💡 For developers: Generate scrypt hashes with:

const hash = await scrypt(password, salt, N, r, p, keyLen);

# JavaScript using scrypt-js library

hash = hashlib.scrypt(password, salt=salt, n=N, r=r, p=p, dklen=keyLen)

# Python using hashlib

About Scrypt Key Derivation Function

Scrypt is a password-based key derivation function designed to be computationally and memory intensive, making it resistant to hardware-based attacks. It was created by Colin Percival in 2009 and is specifically designed to be expensive to implement in custom hardware (ASICs) and GPUs.

Scrypt Parameters Explained

• N (CPU/Memory Cost): The CPU/memory cost parameter. Must be a power of 2. Higher values increase memory and CPU usage.
• r (Block Size): The block size parameter, which affects the memory usage. Typically 8.
• p (Parallelization): The parallelization parameter. The number of independent memory-hard computations.
• keyLen (Key Length): The length of the derived key in bytes.

💡 Memory Hardness: Scrypt requires large amounts of memory for computation, making it resistant to ASIC and GPU attacks that work well against memory-less algorithms like SHA-256.

Common Uses of Scrypt

Scrypt is widely used in various security applications where strong password protection is required:

Application	Usage
Password Storage	Secure storage of user passwords in databases
Cryptocurrencies	Litecoin and other altcoins use scrypt for proof-of-work
Key Derivation	Deriving encryption keys from passwords
Backup Systems	Tarsnap backup service uses scrypt for key derivation

Scrypt vs Other KDFs

Algorithm	Memory Usage	ASIC Resistance	Common Uses
PBKDF2	Low	Poor	Legacy systems, WPA2
bcrypt	Moderate	Good	Password hashing
Scrypt	High	Excellent	Passwords, cryptocurrencies
Argon2	High	Excellent	Modern applications, winner of PHC

💡 Best Practice: For password hashing, use scrypt with N=16384, r=8, p=1 as a minimum. Increase N as hardware improves. Always use a unique, random salt for each password.

Security Recommendations

• Always use a cryptographically secure random salt for each password
• Choose parameters that require at least 100ms of computation time on your hardware
• Store parameters (N, r, p) along with the hash for verification
• Consider using Argon2 for new applications as it's the current PHC winner